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December Weather in New London, United States

Last updated: June 24, 2025

In December, the average temperature in New London, United States hovers around -4°C (26°F). This chilly month can see temperatures dip as low as -28°C (-18°F), while occasionally reaching a maximum of 17°C (63°F). Expect about 55 mm (2.2 in) of precipitation spread over 7 days, accompanied by high humidity levels averaging 87%. Stay warm and prepared for the elements!

December Temperature in New London

In December in New London, the average temperature is -4°C (26°F), with maximums reaching up to 17°C (63°F) and minimums plummeting as low as -28°C (-18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and unexpectedly warm days.

December Weather in New London: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in New London, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New London, December typically has an average temperature of -4°C (26°F), with highs reaching up to 17°C (63°F) and lows dropping to around -28°C (-18°F).
JanFebMarAprMayJunJulAugSepOctNovDec191933435768736962493425
Data source: Temperature data for New London generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in New London

In New London in December, the precipitation amount is 55 mm (2.2 in) over the course of 7 days.

December Precipitation Trends in New London

The chart displays monthly precipitation patterns in New London, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In New London, December typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec394961102109104116114791025155
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in New London

In New London in December humidity is 87%. With average temperature -4°C (26°F), this humidity feels like an icy blanket enveloping you, making outdoor activities challenging and rendering those brisk air moments difficult to bear, as the cold moisture seeps into your clothing and chills you to the bone.

December Average Humidity in New London

This chart illustrates the average monthly humidity levels in New London, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in New London is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%87%84%77%75%75%73%78%84%89%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in New London

In New London in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in New London, you can visit Hourly UV Index in New London.

Maximum UV Index Levels in New London for December

The chart shows the monthly maximum UV Index (UVI) for New London in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in New London typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: New London December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in New London Compares to Other Months

Weather in New London varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in New London, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in New London, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)39 mm (1.5 inches)89%moderate
February Weather-7°C (20°F)49 mm (1.9 inches)90%moderate
March Weather0°C (33°F)61 mm (2.4 inches)87%moderate
April Weather6°C (43°F)102 mm (4.0 inches)84%very high
May Weather14°C (57°F)109 mm (4.3 inches)77%very high
June Weather20°C (69°F)104 mm (4.1 inches)75%very high
July Weather23°C (73°F)115 mm (4.5 inches)74%very high
August Weather21°C (70°F)114 mm (4.5 inches)73%very high
September Weather17°C (62°F)79 mm (3.1 inches)78%high
October Weather9°C (49°F)101 mm (4.0 inches)84%moderate
November Weather1°C (35°F)51 mm (2.0 inches)89%moderate
December Weather-4°C (26°F)55 mm (2.2 inches)87%low

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